La. Stat. tit. 33 § 4066.9
Property owners who desire to fund the acquisition, construction, and maintenance of the individual sewerage system through this program shall affirmatively elect to participate in the program and shall submit to the engineer for the program his election to participate in the program together with the type of approved individual treatment system he desires to fund. The individual sewerage system that is funded through this program shall comply with all guidelines established by the governing authority of the parish, sewerage district, or commission. This election to participate may also provide for the property owner to fund the purchase of the individual sewerage system through the issuance of bonds by the parish, sewerage district, or commission as hereinafter provided. This election to participate may be done on a monthly basis.
La. R.S. § 33:4066.9